将时间戳转换为星期几 android

Question

I am trying to convert a timestamp to a day of the week.

The goal would be to translate to something like ts -> MON or TUE....

I have tried the code below but it's not working.

fun convertToReadableDate(timestamp: Long): String {
    val formatter = SimpleDateFormat("dd-mm-yyyy")
    val cal = Calendar.getInstance(Locale.ENGLISH)
    cal.timeInMillis = timestamp * 1000
    val date: LocalDate = LocalDate.parse(formatter.format(cal.time))
    return date.dayOfWeek.toString()
}

Any idea? Thanks

Answer 1

You can use this formatter:

fun convertToReadableDate(timestamp: Long): String = 
        SimpleDateFormat("EEE", Locale.ENGLISH).format(timestamp)
       .toUpperCase(Locale.ENGLISH)

Answer 2

1. get the day of the week from Unix timestamp:-

    fun getDayOfWeek(timestamp: Long): String { return SimpleDateFormat("EEEE", Locale.ENGLISH).format(timestamp * 1000)

   }

2. getMonth:

    fun getMonthFromTimeStamp(timestamp: Long): String { return SimpleDateFormat("MMM", Locale.ENGLISH).format(timestamp * 1000)

   }

3. getYear:

    fun getYearFromTimeStamp(timestamp: Long): String { return SimpleDateFormat("yyyy", Locale.ENGLISH).format(timestamp * 1000)

   }

4. if you need all three combined in one function: (WED-MAY-2021)

    fun getDayOfWeek(timestamp: Long): String { return SimpleDateFormat("EEEE-MMM-yyyy", Locale.ENGLISH).format(timestamp * 1000) }

5. if you need a combination of either of two in one function:(WED-MAY)

    fun getDayOfWeek(timestamp: Long): String { return SimpleDateFormat("EEEE-MMM", Locale.ENGLISH).format(timestamp * 1000) }